<p>&Beta;&omicron;&eta;&theta;ά&mu;&epsilon; &tau;&omicron;&upsilon;&sigmaf; &mu;&alpha;&theta;&eta;&tau;έ&sigmaf; &nu;&alpha; &epsilon;&pi;&iota;&lambda;ύ&sigma;&omicron;&upsilon;&nu; &tau;&iota;&sigmaf; &epsilon;&xi;&iota;&sigma;ώ&sigma;&epsilon;&iota;&sigmaf; 2&omicron;&upsilon; &beta;&alpha;&theta;&mu;&omicron;ύ &tau;&eta;&sigmaf; &mu;&omicron;&rho;&phi;ή&sigmaf;:</p> <p>&alpha;x^2+&beta;x+&gamma;=0, &alpha;&ne;0 ,&nbsp;&mu;&epsilon; &tau;&eta; &mu;έ&theta;&omicron;&delta;&omicron; &tau;&eta;&sigmaf; &Delta;&iota;&alpha;&kappa;&rho;ί&nu;&omicron;&upsilon;&sigma;&alpha;&sigmaf;.</p> <p>&Upsilon;&pi;ά&rho;&chi;&omicron;&upsilon;&nu; &tau;&rho;&epsilon;&iota;&sigmaf; &delta;&iota;&alpha;&phi;&omicron;&rho;&epsilon;&tau;&iota;&kappa;έ&sigmaf; &pi;&epsilon;&rho;&iota;&pi;&tau;ώ&sigma;&epsilon;&iota;&sigmaf;:</p> <p>1) &Delta;&gt;0,&nbsp;2) &Delta;=0, 3) &Delta;&lt;0.</p>